you can use one Google account in both sets of sites created.
Though typically like in any marketing you spread your risk and run your campaigns over a bunch of different accounts.
We sell themed accounts here.
Here's my special offer link
www.peterdrew.aiprofiles.com
generally speaking my TJ software has 4 Google accounts loaded in it at any one time.
Unless I'm doing a specific promo for a client, then I'll get 2 AIP VIP accounts created for that promo and enter them in the software.
And never use your own business google account when using automated tools etc.
hth's
pete